Upgrading with the Internet requires that you download GNU wget, an HTTP retrieval utility. You also need to download a Python script that configures a repository (add-repo.py) on your virtual appliance.
To upgrade Workload Balancing in environments with Internet access
1. If you have not done so already, log in to the Workload Balancing appliance you want to upgrade as described in Section 8.1.1, “Logging in to the Workload Balancing Virtual Appliance”
2. Install GNU wget so you can retrieve the upgrade repository installation script using HTTP:
a. From the bash prompt, run the following command:
yum install wget
b. During installation, wget Setup asks you to accept various prompts, such as the size of the download package and the CentOS key. Type y when prompted.
3. When the wget installation is complete, download “add-repo” script by running the following command:
When this command finishes running, a message appears stating the ‘add-repo.py’ script is saved.
4. At the bash prompt, run the following command to create the upgrade repository on the Workload Balancing appliance:
After the script finishes, the output states “Done.”
5. Do one of the following to upgrade your Workload Balancing virtual appliance:
• To upgrade both CentOS and Workload Balancing, run:
• To upgrade Workload Balancing only, run:
yum update citrix-wlb
• To upgrade CentOS only, run:
yum update –disablerepo=citrix-wlb
6. After upgrading either CentOS or Workload Balancing or both, restart the Workload Balancing virtual appliance.
After upgrading CentOS, the operating-system time changes from Coordinated Universal Time (UTC) to the local time zone. One side effect of this change is that the timestamps in the Workload Balancing log file (LogFile.log) also change from UTC time to local time. If you want to change the system time back to UTC time, run the following command in the Workload Balancing virtual appliance: rm -rf /etc/localtime.